About the Authors

Christopher Wai Hung Yau

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Writing – original draft, Writing – review & editing

Affiliations Translational Health Sciences, University of Bristol, Bristol, United Kingdom, Southmead Hospital, Bristol, United Kingdom

Erik Lenguerrand

Roles Conceptualization, Formal analysis, Supervision, Writing – review & editing

Affiliation Translational Health Sciences, University of Bristol, Bristol, United Kingdom

Steve Morris

Roles Conceptualization, Formal analysis, Methodology, Writing – review & editing

Affiliation Department of Public Health and Primary Care, University of Cambridge, Cambridge, United Kingdom

Tim Draycott

Roles Formal analysis, Supervision, Writing – review & editing

Affiliation Southmead Hospital, Bristol, United Kingdom

Elena Pizzo

Roles Conceptualization, Data curation, Formal analysis, Methodology, Supervision, Writing – review & editing

e.pizzo@ucl.ac.uk

Affiliation Department of Applied Health Research, University College London, London, United Kingdom

Competing Interests

TD is a Trustee of the PROMPT Maternity Foundation, a UK based charity that undertakes research, distributes the PROMPT ‘Course in a Box’ and runs PROMPT ‘Train the Trainers’. TD is partially funded by the PROMPT Maternity Foundation on a secondment basis from North Bristol NHS Trust. CWHY has previously been partially funded by the PROMPT Maternity Foundation. EL is an employee of the University of Bristol which receives funding from PROMPT Maternity Foundation to pay part of EL’s salary. EP and SM have no competing interests. This does not alter our adherence to PLOS ONE policies on sharing data and materials.